Twice Circled has announced a "Freshwater Frenzy" DLC expansion for Megaquarium on PC. The DLC will include the following features.
- 5 levels in a freshwater-focused campaign
- 30 freshwater species
- Breeding and hybridisation
- 7 new tanks
- 4 accessories to equip your staff
- Dozens of new objects including decorations, plants, equipment and posters
- 4 brand new paints to keep your aquarium looking “fresh”
While only announced for PC right now, the developers are indeed thinking about console versions. They have specifically said that they're "keen to bring" the DLC to consoles "at a later date."